Re: Stealing ur megahurts (no, really)

[Dr. David Alan Gilbert]

* John Richard Moser (nigelenki@xxxxxxxxxxx) wrote:
  > That I wrote
> > <...>
> > 
> > Hi John,
> >   While cpu downclocking helps a bit, it would be hopelessly inaccurate
> > for figuring out if your app would run fast enough on the given
> > ancient machine.  A lot else has happened to the world since the days
> > of the 200MHz CPU:
> >     * Faster memory
> >     * Larger caches
> >     * Faster PCI busses
> >     * Instruction set additions (various more levels of SSE etc)
> >     * Faster discs
> >     * Changes to the CPU architecture/implementation
> > 
> 
> Skews and fuzz.  Imperfections, but at least we get a general idea.  ;)

Really? I bet there is a factor of 2 at least in that lot when you
put them together? (Depending on what you are running)
Remember the reason you are scrabbling around for this ancient machine
is to answer a question along the lines of 'is my program useable on a
.....' ?
Also you want to make sure you haven't made an assumption about an actual
feature (you left a cmov in somewhere? You assumed AGP? LBA block addressing
etc).

Dave
-- 
 -----Open up your eyes, open up your mind, open up your code -------   
/ Dr. David Alan Gilbert    | Running GNU/Linux on Alpha,68K| Happy  \ 
\ gro.gilbert @ treblig.org | MIPS,x86,ARM,SPARC,PPC & HPPA | In Hex /
 \ _________________________|_____ http://www.treblig.org   |_______/
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